Device for cleaning interdental spaces



May 3 1927.

H. MUNRO DEVICE: F01; CLEANING INQIERDENTAL SPACES Filed April 26. 1925Patented May 3, 1927.

STAT

noeHMUNno', or GLASGOW, soo'rLAnn.

" Device FOR CLEANING m'rnnnnnrai. 'sraons.

Application filed A ril 26, 1926, S'rial' n 1 My invention relates to aing the spaces between the t and e cient nature.

' In carrylng out bar or bars n the form of a device for cleaneeth, andhas for. its ob'ect to provide one of a very simple" this invention, Iprovide a bow between the ends of which a thread is stretched, the

thread being drawn to and teeth. i

The limbs of thedevice are mately in formof the letter I bars of the 27sbeing ends-the middle laid close together so that fro between the bentapproxi- Z near their the limbs cross one another and in such a mannerthat when the uncrossed parts comprising the whole or the greater partof the the crossing and between it limbs adjoining and the loop of thebow are pressed together, the ends move apart and draw tight a threadattached to the tips of the how.

The appliance also includes a receptacle for holdin a supply fasteningthe thread In order that my of thread, means for and for cutting it.

invention may be properly understood and carried into effect, I

hav hereunto appended one sheet of drawings, of which Figure and Figure2 a side view The bow consists of a 1 is a front elevation, of theapparatus. bent bar 1 having its limbs 1, 4, extended parallel, orslightly inclined, to each other, 5. This crossing is effected limbtowards the other or about 90.

and then crossed at by bending each through an angle of, After a shortdistance each limb is again bent through an angle of, or about 90 andextended parallel, or inclined at a small angle to the other or to itsown previous direction, but not each limb being thus shape in the sameline, (1 approximately in the form of the letter Z, the centre bar ofthe Z of one limb being the other.

In each tip 3 of the bow and around or partly groove 7", this groovebeing an led or undercut on that close to that of there is a slit 1 1around each tip is a preferably right side nearest the ent of the bow.The thread is coiled in a container 8, held in the loop 12 of the bow bymeans of flanges 13. Said container has a thread cutter 17. The limbs ofthe bow have thread fastening buttons 10.

From the container 8 the to the tips of the bow, and tion of thecomplete thread 2 is taken from the formalimbs it will be seen that theangle formed between the thread and each tip is 90 or appr oximatingthereo4,s 2e,ana in Great Britain October 17, 1925.

second slit. By nowpressing together with the fingers on any part of thelimbs 41, 4:, between the crossing 5 and the looped part of the bar 1,the ends 3, 3, are moved apart and stretch the thread 2, attached to thetips. Thus held the thread "is inserted bebetween the teeth and drawn toand fro be tween them. A thread cutter 17 is formed on, or attached to,the container.

By thus bending the limbs of the bow approximately in the form of theletter Z and crossing them to form approximately the letter H manyadvantages are obtained. The operating part 2 of the thread being at, orabout at right angles to the tips, its'whole length is available forcleaning and the width from tip to tip is thus reduced to a minimumwhich makes for convenience when the tips are inserted into the month.By making the crossing 5 parallel to thread 2 the distance between themis reduced to a minimum and consequently the distance from the usersfingers (when holding the instrument on the other side of the crossing 5from the thread 2) is also reduced to a minimum, thus affording him themaximum control over the manipulation of thread 2. Since the limbs arewide apart between crossing 5 and loop 1, ample travel of the tips canbe obtained in order to takeup any stretch of the thread 2 and to varythe 1on gitudinal tension on it. As the limbs are preferably of smalldimensions, (for convenience in the mouth), the disposal of the limbs,wide apart at the crossing, affords asecure grip to the user and adds tohis control over the thread 2. The groove 7 around or partly around thetips effectively prevents the thread slipping off the tips when theinstrument is in use.

Claims.

1. Device for cleaning interdental spaces comprising a bow having a loopat one end and limbs extending from said loop substantially parallel toeach other, the limbs thereafter being crossed by bending them towardsone another, through an angle of substantially 90, and then extendedagain substantially parallel to each other and to their previousdirections, such that when any portion of the limbs between the loop andthe crossresponding groove and laid again in the" and a groove arounding are pressed together the, ends 11love apart and exert lOllgitudinaltension on a thread attached to the tips of the bow and at an angle tothem of substantially 90.

I each other throug an angle of substantially and h n exte ded agai subsantially parallel to each other and to their previous direction, suchthat when-any portion of the limbs between the loop and the crossing are3 pressed together the ends move apart and exert longitudinal tension ona thread at? tflCllQCl to the tips of the bow and at an angle to them ofsubstantially 90, each end portion of said how being provided with aslit in it.

,3, Device for cleaning interdental spaces comprisinga bow having loopat one end and limbs extending from said loop substantially parallel toeach other, the limbs thereafter being crossed by bending them towardsin each other through an angle of substantially 90 and then extendedagain substantially p al el to eac o her and t th ir pr direction, suchthat when any portion of the mb b tw en the loop and the o sing r pressd together the ends more apart and exert longitudinal tension on athread at tached to the tips of the bow and at an angle of substantially.90", each end portion of said bow being provided with a slit in, and agroove around it and a container for thread arranged n the loop of saidhow.

In witness whereof I atlix my signature.

HUGH MUN R0.

